tap on
动词- To strike an object or a person lightly and swiftly.
- To initiate an electronic ticketing process at the start of a public transport journey by holding a chipcard or a mobile device close to a terminal or reader
来自图书馆
He tiptoed along the hall and stood for several minutes outside the door of the east gable before he summoned courage to tap on it with his fingers and then open the door to peep in.
I was hesitating as to what I should do when there was a sharp tap on my shoulder, and there was Colonel Emsworth beside me.
在真实文章中学习tap on
注册免费账号后，在图书馆中把鼠标悬停在任何单词上即可看到意思，还能听朗读、收藏单词并按你的记忆安排复习，看到每本书你已经认识多少。